Abstract [en]

There purpose of this thesis was design and evaluate a device which would listen to the proprietary interface between a Private Automatic Branch Exchange (PBX) and a Digital Enhanced Cordless Telecommunications (DECT) basestation. The signal information has been transfered to a PC in order to collect and analyse data. The analysis has been limited to the bottom 4 layers. The software developed enables the display of the messages in either hex or clear text.